Page:Darwin - The various contrivances by which orchids are fertilized by insects (1877).djvu/203

 

Fig. 29.

Catasetum saccatum.

an.a. anther.

an. antennæ of the rostellum.

an.d. disc of pollinium.

an.f. filament of anther.

an.g. germen or ovarium.

an.l. labellum.

an.p. pollen-masses.

pd. or ped. pedicel of pollinium.

an.s. stigmatic chamber.

A. Front view of column.

B. Side view of flower, with all the sepals and petals removed except the labellum.

C. Diagrammatic section through the column, with all the parts a little separated.

D. Pollinium, upper surface.

E. Pollinium, lower surface, which before removal lies in close contact with the rostellum.